I am very interested in marine biology.

He is known as a person with learning.

He received the letter challenging him to a duel and began preparing for the duel.

The Japan Current is a warm current that flows from north to south along the west side of Japan.

Gender roles are an important element in defining individual behavior in society.

His role is to fulfill his responsibilities as a leader.

It is important to understand the importance of health.

My major is oceanography.

Marine pollution is a global issue, and all countries should cooperate to find a solution.

He understands the importance of learning.